Instrument: Sea-Bird SBE 13 Dissolved Oxygen Sensor

Dissolved oxygen sensor with either a Beckmann (SBE 13B) or YSI polarographic element (SBE 13Y limited to 2000m depth). Designed to interface with the SBE 9 and 9plus CTD underwater units. An optional plenum to connect into the pumped plumbing system was available but usage with the membrane exposed was possible. Replaced by the SBE 43 in 2001.